diff options
author | Tejun Heo <htejun@gmail.com> | 2007-04-17 23:44:07 +0900 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-04-28 14:16:03 -0400 |
commit | f5cda257296fbd3683b1f568f2d94d3caaacf74d (patch) | |
tree | a0c31206f6a7f299c11f233a22f3b8b8aa836151 /drivers/ata/libata-core.c | |
parent | f31871951b38daf2d7ca17daad59fdb735062da3 (diff) |
libata: implement ata_host_alloc_pinfo() and ata_host_register()
Implement ata_host_alloc_pinfo() and ata_host_register(). These helpers
will be used in the following patches to adopt new init model.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r-- | drivers/ata/libata-core.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b23f35a4ee6..ab189d3b84d 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5830,6 +5830,55 @@ struct ata_host *ata_host_alloc(struct device *dev, int max_ports) } /** + * ata_host_alloc_pinfo - alloc host and init with port_info array + * @dev: generic device this host is associated with + * @ppi: array of ATA port_info to initialize host with + * @n_ports: number of ATA ports attached to this host + * + * Allocate ATA host and initialize with info from @ppi. If NULL + * terminated, @ppi may contain fewer entries than @n_ports. The + * last entry will be used for the remaining ports. + * + * RETURNS: + * Allocate ATA host on success, NULL on failure. + * + * LOCKING: + * Inherited from calling layer (may sleep). + */ +struct ata_host *ata_host_alloc_pinfo(struct device *dev, + const struct ata_port_info * const * ppi, + int n_ports) +{ + const struct ata_port_info *pi; + struct ata_host *host; + int i, j; + + host = ata_host_alloc(dev, n_ports); + if (!host) + return NULL; + + for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + + if (ppi[j]) + pi = ppi[j++]; + + ap->pio_mask = pi->pio_mask; + ap->mwdma_mask = pi->mwdma_mask; + ap->udma_mask = pi->udma_mask; + ap->flags |= pi->flags; + ap->ops = pi->port_ops; + + if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) + host->ops = pi->port_ops; + if (!host->private_data && pi->private_data) + host->private_data = pi->private_data; + } + + return host; +} + +/** * ata_host_start - start and freeze ports of an ATA host * @host: ATA host to start ports for * @@ -6042,6 +6091,48 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) } /** + * ata_host_activate - start host, request IRQ and register it + * @host: target ATA host + * @irq: IRQ to request + * @irq_handler: irq_handler used when requesting IRQ + * @irq_flags: irq_flags used when requesting IRQ + * @sht: scsi_host_template to use when registering the host + * + * After allocating an ATA host and initializing it, most libata + * LLDs perform three steps to activate the host - start host, + * request IRQ and register it. This helper takes necessasry + * arguments and performs the three steps in one go. + * + * LOCKING: + * Inherited from calling layer (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +int ata_host_activate(struct ata_host *host, int irq, + irq_handler_t irq_handler, unsigned long irq_flags, + struct scsi_host_template *sht) +{ + int rc; + + rc = ata_host_start(host); + if (rc) + return rc; + + rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, + dev_driver_string(host->dev), host); + if (rc) + return rc; + + rc = ata_host_register(host, sht); + /* if failed, just free the IRQ and leave ports alone */ + if (rc) + devm_free_irq(host->dev, irq, host); + + return rc; +} + +/** * ata_device_add - Register hardware device with ATA and SCSI layers * @ent: Probe information describing hardware device to be registered * @@ -6547,8 +6638,10 @@ EXPORT_SYMBOL_GPL(ata_std_bios_param); EXPORT_SYMBOL_GPL(ata_std_ports); EXPORT_SYMBOL_GPL(ata_host_init); EXPORT_SYMBOL_GPL(ata_host_alloc); +EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); EXPORT_SYMBOL_GPL(ata_host_start); EXPORT_SYMBOL_GPL(ata_host_register); +EXPORT_SYMBOL_GPL(ata_host_activate); EXPORT_SYMBOL_GPL(ata_device_add); EXPORT_SYMBOL_GPL(ata_host_detach); EXPORT_SYMBOL_GPL(ata_sg_init); |